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  #1  
Old 08-22-2006, 08:08 PM
1968cuda 1968cuda is offline
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Default 904 auto tranny durability

How much hp can a 1968 904 auto tranny handle?
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Old 08-22-2006, 08:30 PM
70AARCuda 70AARCuda is offline
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My 904 run in the 10s out here in las vegas.....i just rebuilt it for the first time since 1995... I also use a tranny brake which is hard on the trans..

the reason i rebuilt it was i broke a ring gear which destroyed the spraq in the trans...otherwise it was still working fine...

I am using the 904 in my 69 barracuda, i also have a 904 to use in my 71 dart that my daughter will drive at the strip...


So i dont have hp numbers but i dont worry about using a 904s.....
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Old 08-22-2006, 08:56 PM
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dave571 dave571 is offline
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There are a lot of variables to what a trans will take.

The 727 is undoubtedly stronger, and I have broken them with only 300 hp. Heavy application.

What is the combo in question?

I think it is safe to say that a 904 will safely take a pretty good pounding in an A body street car.
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Old 08-22-2006, 09:05 PM
1968cuda 1968cuda is offline
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Well Im about to rebuild my engine, and I was trying to get about 350hp out of my 318. I was just worried that the 904 wouldnt be able to handle that power. There isnt anything wrong with it at the moment, but I just wanted to see what I might have to deal with after the rebuild.
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